This is one of the fundamental problems of the
Fediverse/ActivityPub model, where your chosen instance is the
arbitrator of what you see.
In comparison,
even if the operator of a big Nostr relay bans/blocks an account, users
who follow that account can still see their stuff because they're
generally connected to multiple relays at the same time.
On
top of that, even if every relay in my list blocks an account I follow,
NIP-65 makes it so that my client will find which relays that account
posts to and pull in their content. Only I get to choose who is blocked
from my feed, not the relays.
